As someone who did that for a longer strech of time last year, because of starting a company, organizing a conference in parallel and socializing within the local programming community: it sucks you out. Not physically, but mentally, because all you do is "work". Worse: you get used to that state.
I still do that from time to time if things just cannot be pushed, but in very short spans.
I should say that I consider all my learning endeavors "free time", so its not like I just watch TV after work. I just don't do any business work.
As a sidenote, I had the most productive time in my life when I was working in France, 35 hours a week. As someone used to 40 hours, I always felt like I shouldn't waste any minute to get my stuff done :).
I still do that from time to time if things just cannot be pushed, but in very short spans.
I should say that I consider all my learning endeavors "free time", so its not like I just watch TV after work. I just don't do any business work.
As a sidenote, I had the most productive time in my life when I was working in France, 35 hours a week. As someone used to 40 hours, I always felt like I shouldn't waste any minute to get my stuff done :).